01322nas a2200205 4500008004100000022001600041245004700057210004700104300000800151490000600159520072900165653001800894653002500912653002500937653002200962653001300984653002000997100002001017856007901037 2010 eng d a1989‐864900aJournal Management of Biological Invasions0 aJournal Management of Biological Invasions a1-50 v13 aMisidentifications are an important but neglected problem in studies on plant invasions. This review shows how taxonomic education of staff and stakeholders is of great importance for correctly assessing threats provoked by alien plant species in field and literature based studies. Four randomly chosen recent examples (Digitaria violascens, Eleocharis pellucida, Juncus dichotomus and Vicia dalmatica) from Europe demonstrate that, as a result of an initial erroneous identification and/or confusion with similar harmless species, potentially noxious environmental weeds have been able to become fully naturalised. They act as “invaders in disguise” and therefore constitute a real problem for conservation management.10aalien species10aDigitaria violascens10aEleocharis pellucida10aJuncus dichotomus10ataxonomy10aVicia dalmatica1 aVerloove, Filip uhttp://www.managementofbiologicalinvasions.net/index_file/Verloove2010.pdf